As with capital goods (tangible items such as buildings, machinery, and equipment produced and used in the production of other goods and services), the consumption of a durable good is spread over its life span, which tends to create demand for a series of maintenance services.
The event which is referred to as The Phoenix Lights comprised of a series of incidents, involving a number of different craft and orbs which took place during the evening of March 13th 1997.
He came to the same conclusion that he did in his 1998 MUFON report. Dr. Maccabee re-affirms that the lights of the arc videos were at a great distance from Phoenix, probably in the vicinity of the Goldwater Gunnery Range, and most likely military illumination flares deployed by the Maryland ANG.